| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt\n\nIf an AX25 device is bound to a socket by setting the SO_BINDTODEVICE\nsocket option, a refcount leak will occur in ax25_release().\n\nCommit 9fd75b66b8f6 (\"ax25: Fix refcount leaks caused by ax25_cb_del()\")\nadded decrement of device refcounts in ax25_release(). In order for that\nto work correctly the refcounts must already be incremented when the\ndevice is bound to the socket. An AX25 device can be bound to a socket\nby either calling ax25_bind() or setting SO_BINDTODEVICE socket option.\nIn both cases the refcounts should be incremented, but in fact it is done\nonly in ax25_bind().\n\nThis bug leads to the following issue reported by Syzkaller:\n\n================================================================\nrefcount_t: decrement hit 0; leaking memory.\nWARNING: CPU: 1 PID: 5932 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31\nModules linked in:\nCPU: 1 UID: 0 PID: 5932 Comm: syz-executor424 Not tainted 6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nRIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31\nCall Trace:\n <TASK>\n __refcount_dec include/linux/refcount.h:336 [inline]\n refcount_dec include/linux/refcount.h:351 [inline]\n ref_tracker_free+0x710/0x820 lib/ref_tracker.c:236\n netdev_tracker_free include/linux/netdevice.h:4156 [inline]\n netdev_put include/linux/netdevice.h:4173 [inline]\n netdev_put include/linux/netdevice.h:4169 [inline]\n ax25_release+0x33f/0xa10 net/ax25/af_ax25.c:1069\n __sock_release+0xb0/0x270 net/socket.c:640\n sock_close+0x1c/0x30 net/socket.c:1408\n ...\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n ...\n </TASK>\n================================================================\n\nFix the implementation of ax25_setsockopt() by adding increment of\nrefcounts for the new device bound, and decrement of refcounts for\nthe old unbound device." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/ax25/af_ax25.c" |
| ], |
| "versions": [ |
| { |
| "version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", |
| "lessThan": "90056ece99966182dc0e367f3fd2afab46ada847", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", |
| "lessThan": "94a0de224ed52eb2ecd4f4cb1b937b674c9fb955", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", |
| "lessThan": "b58f7ca86a7b8e480c06e30c5163c5d2f4e24023", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", |
| "lessThan": "470bda72fda0fcf54300466d70ce2de62f7835d2", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", |
| "lessThan": "bca0902e61731a75fc4860c8720168d9f1bae3b6", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "c44a453ffe16eb08acdc6129ac4fa0192dbc0456", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "de55a1338e6a48ff1e41ea8db1432496fbe2a62b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "9e1e088a57c23251f1cfe9601bbd90ade2ea73b9", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "b20a5ab0f5fb175750c6bafd4cf12daccf00c738", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "452ae92b99062d2f6a34324eaf705a3b7eac9f8b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "534156dd4ed768e30a43de0036f45dca7c54818f", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/ax25/af_ax25.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.18", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "5.18", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.129", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.79", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.16", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.4", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.18", |
| "versionEndExcluding": "6.1.129" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.18", |
| "versionEndExcluding": "6.6.79" |
| }, |
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| "versionStartIncluding": "5.18", |
| "versionEndExcluding": "6.12.16" |
| }, |
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| }, |
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| "versionStartIncluding": "5.18", |
| "versionEndExcluding": "6.14" |
| }, |
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| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.14.277" |
| }, |
| { |
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| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.19.240" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.4.190" |
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| { |
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| "versionStartIncluding": "5.10.112" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.15.35" |
| }, |
| { |
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| "versionStartIncluding": "5.17.2" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/90056ece99966182dc0e367f3fd2afab46ada847" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/94a0de224ed52eb2ecd4f4cb1b937b674c9fb955" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/b58f7ca86a7b8e480c06e30c5163c5d2f4e24023" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/470bda72fda0fcf54300466d70ce2de62f7835d2" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/bca0902e61731a75fc4860c8720168d9f1bae3b6" |
| } |
| ], |
| "title": "ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-21792", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
